2010 Fiscal Year Final Research Report
FLOW CHARACTERISTICS OF JET HAVING BOTH DIFFUSION ENHANCEMENT AND DIRECTION CONTROL FUNCTIONS
| Project/Area Number |
20560174
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Kagoshima National College of Technology |
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Principal Investigator |
TABATA Takahide Kagoshima National College of Technology, 機械工学科, 准教授 (50290846)
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| Co-Investigator(Kenkyū-buntansha) |
RINOSHIKA Akira 山形大学, 大学院・理工学研究科, 教授 (00253906)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 噴流 / 5角形ダクト / 拡散 / ウェーブレット変換 / 熱線流速計 |
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| Research Abstract |
As a part of study on the diffusion control and the direction one the flow visualization of the jet flow issuing from the pentagonal duct was performed by the LIF method. And the jet diffusion was investigated by analyzing the velocity distribution, the velocity decay, the jet half width and the turbulent intensity obtained from the data by using the hot wire anemometer. Moreover, in order to reveal the coherent structure of the jet flow, the continuous wavelet transform was conducted using the information of the fluctuating velocity component at the measuring point showing the half value width. Furthermore, the characteristic of the jet with adding the synthetic jet as an oscillating flow was also studied.
As a result, it has been clarified that the diffusion of the jet with the synthetic jet is promoted comparing with that of the jet without one. And it has been found that the jet is induced toward the side on which the synthetic jet is added. Moreover from the result of the wavelet analysis, by adding the synthetic jet, it has been also clarified that the low frequency component of the fluctuating velocity is relatively wakened.
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Research Products
(14 results)
